Reinforced paper fabric.



P. T. JACKSON, JR.

' REINFORCED PAPER FABRIC.

APPLICATION FILED SEPT. 22. 1916.

i; T" 1H1 i u! M 8/ V v/v TOR ATTORNEY rcr Manson, in, or trainer,naaeacnusnrrs, nssranoa re rarnn EACH'USETTE.

REINFORCED PAPER FABRIC.

Specification of Letters latent.

Patented Feb. 5, ilfitd.

@rigtnel application filed June 2t, 1918, Serial Ito. 106,504. mvtdedand this application filed septernber 83,

1918. terial Ito. lancer.

class have been reinforced by securin to the surface thereof threads orcords w ich have been previously spun or twisted into a continuousfilament, and such continuous threads or cords have been laid eithertransversely or transversely and longitudinally upon the surface of thefabric to be reinfor.

In a prior application, filed by applicant,

Serial No. 106,504, filed June 28, 1916, a machine for reinforcing paperfabrics or the like by adhesivel securing thereto uns un v and untwistedfi ers in substantiallyt air nlatnral condition, was described, as well,a, as the-fabric which resulted from the o eration of the machine. Thepresent app ication is a division of the said prior application, and isdirected to the fabric itself.

The aim and purpose of the present invention, therefore, is a paperfabric for use as a cover, wrapper, or container which is reinforced bya series of unspun fibers in sub stantially their natural condition,secured to the fabric with the lengthwise dimension of the unspun fiberextending transversel thereof. In some cases it may be desire is thatthe fabric be further reinforced by similar unspun fibers extending insubstantially parallel relation longitudinally of the fabric, and theinvention further contemplates, therefore, such transverse andlongitudinal reinforcement of the fabric by the unspunfibersarran d intheir respective transverse and long'itu 'nal direcions generallyparallel to each other.

The individua fibers will ordinarily be of less length than thetransverse ensions of the paper strip or fabric to which they aresecured, and an important feature of the present invention, therefore,consists in adhesively securing to the fabric, the series of unspunfibers in substantially their natural state with the adjacent ends ofthe fibers between the side edge portions of the fabric, when theindividual fibers are of less length than the width of the fabric inoverlyin relation.

The a hesive used for securing the unspun fibers in the describedrelation may be of any appropriate character, but for some purposes awater-proof esive is found especially fitted for this purpose. in orderthat the transversely extending or trans versely and longitudinallyentendin unspun fibers may be rotected, it is desirable in someinstances 0 the invention to secure the unspun fibers in their describedrelation between two plies or paper fabrics.

In the drawings Figure 1 is a plan view show a strip of paper or likefabric having thesively secured thereto a series of unspun fibers insubstantially their natural condition, the ends of the unspun fiberswhere the fibers are of less length than the widthof the fabric being inoverlappin relation;

Fig. 2 is a view snrni ar to that of Fig. l, with the addition of thelongitudinally-entending unspun fibers adhesively secured to the surfaceof the fabric;

Fig. 3 represents a iece of reinforced fabric comprising two p ies ofpaper having the transversely-arranged unspun fibers secured betweenthem: and

Fig. 4 is a view similar to that of Fig. 3,

with the fibers extending both transversely a web or strip of paper orother fabric to be reinforced or strengthened by the appli- (ill till

cation thereto of unspun fibers to form a tough and not easily tornfabric that may be safely emplo ed as a wrapper, cover, or container forsubstances. The unspun fibers may be any of those now well mown, eitheranimal or vegetable, but preferably the latter, such, for instance, asflan, sisal hemp, cotton, waste, jute, and the like. The fiber is firstprepared in the usual manner ac cording to" the character of fibereniloyed,

which has the efiect of laying the 11-. in

- a general parallel relation, the word 1parallel being herein used in ageneral t ough not strict sense, but since the machines and process forpreparing fiber are well known to those skilled in the art and theinvention does not relate to either, a detailed description of thesemachines and processes is unplied to the paper just prior to the timethe unspun fibers are placed thereon. In some cases, the unspun fibersmay be a plied to the paper fabric as it is supplie from a paper-makingmachine, or. the paper may be supplied from a suitable roll.

When the length of the individual fibers is less than the width of theweb or stri of fabric to be reinforced by them, the en portions of thetransversely extending fibers as at 3, Fig. 1. overlap and theoverlapping ends of the fibers in different portions of the paper fabricare out of line with each other longitudinally of the fabric, so that noline of weakness is formed in the longitudinaldirection of the fabric.

In Fig. 2, which represents the fabric described with reference to Fig.1, plus the longitudinally-extending series of unspun fibers, thelongitudinal fibers 4 likewise preferably have their ends overlapping,as at 5, Fig. 2, and either overlie or underlie the transverselydisposed series of unspun fibers.

As hereinbefore noted, it may sometimes be desirable to protect thereinforcing fibers on account of their delicate nature, and to this endthe transversely-extending fibers may be secured between the two pliesof fabric as represented in Fig.3, wherein 1 indicates one of theinclos'ing plies similar to that of Fig. 1, andi 'fi indicates theoverlying ply or fabric which is adhesively se cured to the under ply toprotect the trans versely-extending fibers by a suitable ad hesive,preferably water-proof in character. 1

-I'n Fig. 4, the unspun fibers extending in substantially parallelrelation both.longitudinally and transversely of the fabrics, areindicated as inclosed between two plies which are secured togethersubstantially as described, for the construction indicated in Fig. 3.

The fabric produced by the adhesive appli'cation to the surface thereofof a series of transversely-extending unspun fibers, affords anexcellent covering or wrapping material wherein strength and'toughnessis desirable, and at the same time, does not produce on the surface ofthe fabric the ribbed and unsightly grooved efiect always apparent whenthe reinforcin element-is formed of spun and twiste threads or cords.Inasmuch, also, asthe unspun fibers when of the relatively short lengthhave their adjacent ends overlapping and the strengthening unspun fiberssecured thereto with their longitudinal dimension extending transverselyof the fabric in general parallel relation, the ends of adjacent unspunfibers extending past each other transversely of the paper strip toprevent lines of weakness longitudinally of the fabric.

2. A new article of manufacture consisting of a paper strip having aseries of unspun fibers adhesively secured to the sun face of the paperstrip in parallel relation extending transversely thereof, and a secondseries of unspun fibers adhesively secured to the surface of'the paperstrip in parallel relation longitudinally thereof.

3. As a new article of manufacture, the improved fabric consisting of apaper stn unspun fibers arranged in series and exten ing transversely ofthe strip with the adjacent ends of separate fibers overlapping, anadhesive for securing the unspun fibers upon the surface of the paperstrip, and a second strip of paper overlying the unspun fibers andinclosing'said unspun fibers between the strips.

4. A new article of manufacture consisting of a paper strip having aseries of unspun fibers adhesively secured to the surface of the paperstrip in parallel relat on extending transversely thereof, a secondseries of unspun fibers adhesively secured to the surface of the paperstrip in parallel relation longitudinally thereof, anda second strip ofpaper overlying the unspun fibers and inclosing said fibers between thestrips.

5. As an article of manufacture, a reinforced or strengthened paperfabric, comprising a paper strip, a series of unspun fibers thelengthwise dimension of which extend transversely of the paper strip,the ends of transversely extending unspun fibers overlapping cross-wiseof the paper strip between the edges thereof and avoiding lines ofweakness longitudinally of the paweenie per strip, and a Wete -proofedhwive for securing the reinforcing fibers to the surface of thepaperstrip.

6. As an article of manufacture, a rein 5 forced or strengthened paperfabric, comprising a paper strip, a series of unspun fibers thelengthwise dimension of which en tend transversely of the paper strip,not

hesiv'eiy secured thereto, the ends of traineverseiy extending unspunfibers being disposed out of line longitudinally of the peper strip toevoioi lines of weelmess longitudinaily of the paper strip.

In testimony whereof, I have signed. my name to this specification.

PATRICK TRACE JAGK'EQN, In.

